One of my team works 60% over 4 days, and a client has mentioned to me ever-so-informally that he thinks my part-timer does not progress work as quickly as the rest of the team.
I have to say my initial view is that this is a load of nonsense, she is very efficient. I'll check her workload is appropriate. But I wonder if actually he perceives that she is out a lot (more than she really is) because she puts her out of office assistant on during her part-days. If you work part-time, do you let people know, or treat it as a state secret?